Suspended insulator.



C. W. SCHULTZ.

SUSPENDED INSULATOR.

APPLICATION FILED .TAN.3. 1910.

983,573. Patented Feb. '2', 19m.

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APPLICATION FILED JARS, 1910.

Patented Feb. 7, 1911.

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GLEON W. SCHULTZ, OF SCRANTON, ?ENNSYLVANIA,

SSIG-NOR 1T0 "W. JOHNS- MANVILLE COMPANY, A CORPQRATION OF YORK. s

SUSPENDED INSULA'EOR.

coasts.

Specification of Letters fatent.

Patented Feb 1, 1911.

Application filed Iannary 3, 1910. Serial No. 536,110.

To all whom 'it may concern:

Be it known that 1, Onion .W. SCHULTZ, a citizen of the United States of America, residing at Scranton, county of Lackawanna, State of Pennsylvania, have invented certain new and useful Improvements in Suspended Insulators, of which the following is a. specification.

My invention relates to electrical insulators generally, and more specifically consists of an improved suspended insulator for trol' ley wires and the like electrical conductors. Insulators for this character of Work, when employed in mines, for instance, are supported from various dill'erent kinds of overhead structures, according to the nature of the mine galleries and headings along which the wires run. Sometimes the insulators are attached directly to wooden beams supporting the roof of the gallery or tunnel. Some times, when the roof is high, they are supported from pipes hanging down from the high root timbers, or from pipe brackets extending out horizontally from side tinibers or supports. Heretot'ore, a dillerently shaped insulator has been required for fas toning to each of these different supports and it is the object of my invention to pro duce one standard form of insulator which can be attached equally well and conveniently to all the usual dillercnt forms of overhead supports. I

The best form of apparatus embodying my invention at present known to me is illus trated in the accompanying two sheets of 'drawings in which,

ll ig'ure l is a side elevation of my insulator attached to a de 'iending pipe end. Fig. 2 is a central vertical section of same at tachcd to a barbed screw bolt such as may be driven into timber. Fig. 3 is a plan view of the insulator. Fig. 4 is a. side elevation and partial section of the insulator with sleeve attachment for engaging); a horizontal pipe arm oigbrackct, and F is an end elevation of the sleeve.

Throughout the drawings like reference nun'ibers indicate like parts.

1 is the usual bell shaped shell generally made of n'ietal and containing a body oi. molded insulating material 2, in which is embedded any fastening; member to which the elipor hanger proper (not shown) may be attached.

In the upper portion ofthe shell is a centrally disposed opening at, tapped out to receive and engage with a screw threaded bolt 5. The opening may have an enlarge ment 6 at the bottom for receiving a certain amount of dirt which may be stripped oil the threads by the entering bolt.

Around the upper portion of the shell 1 is formed an annular recess 7, which may be concentric with the opening el and adapted to receive a depending pipe end 8 (see Fig. l) which may be clamped in position by set screws 9, or any other convenient holding means.

The upper portion of the shell 1 may be given an octagonal exterior form, as shown in Fig. 3, or other shape such that it may be conveniently grasped by a wrench when it is to be screwed on to or oil from a bolt, as

10 represents a portion of a horizontal pipe bracket or arm on which is the metal sleeve ll, held in any position by set screw li or other holding means, and having the screw threaded projection 13, adapted to engage. the tapped opening l, of the shell 1.

vThe sleeve also has a flange llaround the screw threaded projection 13, adapted to cover and overlap the annual recess 7 in the shell.

In operation but one form of insulator is needed for attachment to the various sup ports shown, whether the barbed anchor bolt driven into a timber, a hanging pipe end. 8, or the horizontal bracket and sleeve shown. in Fig. 1. The sleeve'll may be adjusted on the bracket by loosening the set screw 12, and the flange l t protects the annular recess 7 from being filled up with dirt, and water :torming rust, when the horizontal bracket siu'iport is used.

lilavinc', therefore, described my; inven- 5 tion, I claim: 7 s

1. In a suspended insulator for trolley wires and the like electrical conductors the combination of a shell for holdinginsulat inc material provided with an opening in ice the upper portion tapped to receive a sup porting screw threaded bolt, an annular recess to receive the end of a supporting depending; pipe, and means for retaining said 7 pipe end in said recess. 1.05

2. ln a suspended insulator for trolley wires and the like electrical conductors a shell for holding insulating material and a support embedded therein, the shell being provided on its upper face with a central 119 sulating material provided with an opening in its upper portion tapped to receive a screw threaded bolt, and an annular recess concentric withsaid opening adapted to receive the end of a supporting depending pipe and means for retaining said pipe end in said recess, together with supporting means provided with a screw threaded projection adapted to engage said tapped opening and with a flange around said screw threaded projection which overlaps the annular recess in the shell when the last mentioned supporting means is employed.

4. In a suspended insulator for trolley wires and the like electrical conductors, the

combination of a shell adapted to contain insulating material provided with an opening in its upper portion tapped to receive a screw threaded bolt, and with an annular recess concentric with said opening adapted to receive the end of a supporting depending pipe and means for retaining said pipe end in said recess, together with a cylindrical sleeve adapted to slip over a horizontal arm and provided with a screw threaded project-ion adapted to engage said tapped opening, the said sleeve being provided with a flange around the screw threaded projection adapted to overlap the annular recess in the shell.

5. In a suspended insulator for trolley wires and the like electrical conductors the combination of a shell adapted to contain insulating material provided with an opening in its upper portion tapped to receive a screw threaded bolt, and with an annular recess concentric with said opening adapted to receive a vertical tubular support, and provided with means for grasping said support, and a cylindrical sleeve adapted to slip over a horizontal arm and provided with a screw threaded projection adapted to engage said tapped opening, said sleeve being provided with a flange around the screw thread ed projection adapted to overlap the annular recess in the shell.

CLEON W. SCHULTZ. 

